Reinforced-concrete sectional pipe and culvert.



. BUSGH.

0. c. ALLEN &

REINFORCED CONCRETE SEGTIONAL PIPBAND GULVERT.

APPLICATION FILED MAR. 9, 1912.

Patented Dec. 30, 1913.

NURRIS PETERS. mu. Lmm. WASHINGTON D C UNITED STATES PATENT OFFICE.

CHARLES C.'ALLEN ND CHARLES Bose-H; or NEBRASKA CITY, NEBRASKA, ASS GN-012s To-THEwILsoN n-E-EnroRcEn CONCRETE .00.,- F NEBRASKA CITY,NEBRASKA,

A CORPORATION OF NEBRASKA.

REINFORCED-CONCRETE SECTIONAL PIPE AND CULVERT.

Specification of Letters Patent. Application filed March 951912.

PatentedDec.30,1913.

Serial No. 682,693. r

To all (c/lomit may concern Be it known that we, CHARLES C. ALLEN andCnantns H. Bi scn. citizens of .the United States residing at NebraskaCity, in

the county of ()toe and State. of Nebraska have invented new and usefulImprovements in Pcinforced- Concrete Sectional Pipesand Culverts, ofwhich the following is a.

, specification. y 10 This invention relates to conduits or culw'eits ofthe sectional type and made of reinforced concrete, and the primaryobject, of i the same is to provide means for etl'ectivoly Qrouting orsealing the bunntsbetWcen the coterininal ends of the sections of astrong and durable character and protected or guarded 2 gainst hinw-outsfrom inner or outer presure and also permitting the fornmtion of aninner flush 'joint so that the i n-' 2O terior portions of the connectedpipe secand the application of grout to the inner channel from the tcpin a perfect manner 80 and also to provide for a perfect joint of thetwo channels and the sections.

A still further object of the invention is to provide reinforcedconcrete pipes or culvert sections having inner and outer groutingchannels which may be filled from the top of the sections and alsoformedwith clencher or anchor channels for holding the grouting inplace, both in the inner and outer ghanncls. and producing a. more reli-40 able joint and means for positively preventing the displin-en'ient ofthe grouting when run into and through the channels-at the joined endsof the sections.

.Vith th-:- e and other objects and advantagcs in \iew the-inventionconsists inthe construction and zll'l'i'lilfijtllitlli' of the severalpa rts which will be more fully hereinafter described and claimed, I

[n the drawing: Figure 1 is a perspective view of a pipe or culvertsection embodying the features of the'invention.. Fig. 2 is. a sectionalelevation of two pipe or culvert sections with ends joined andparticularly illustrating the advantages of the channels and anchor 01'clencher grooves. Fig. 3 i-san'.

end elevation of one of the sections. I V 7 The numeral 5 designates .apipe or cul vvcrtsection .o'r conduit formed of any suitable natcrialsuch asconcrete', and preferably reinforced by longitudinally extendingstrengtheningmembers or draw-bars '6 mm bedded therein and having-theiropposite ends so dispo': as to project beyond the v ends of each sectionand overlapped with similar devices of contiguous sections for thepurpose of receiving coupling means of any suitable characteiz, Theprojecting termipals of the draw-bars. which in the present instance arelooped, will be accessible by the 76 structure shown or bf. any otherpreferred means. the use of these draw-barsin connecting pipe sectionsof'reinforced concrete-being well known in the art andreadilyunderstood. The opposite ends of each section 5 are formed withsegmental flanges 7 and '8, the flange 7 having its inner edgecoinciding with the inner surfaceof the section andritspipe or culvertouter edge terminating at a distancein wardly from the outer surface ofthersec- 20 tion. and the flange'8 being conversely zt'rranged andhaving its inner edge terminating at a distance outwardlyfrom the innersurface or periphery of the pipe section and its outer edge coincidentwith the outer surface of the section; -Between the outer edge of theflange T and the outer surface of the pipe section an anchor or clencherchannel or groove 9 is formed, and between the inner edge of the flange8 and the innersurface or periphery of the pipe section a similar anchoror clencher groove 10 is'provided, the grooves 9 and 10 havingcommunication with each other through the medium of obliquecross-channels 11 at diametrically opposite points and about inalinement with the horizontal diameter of the pipe sect-ion. Between theinner edge of the flange 8 and the inner periphery of the pipe section,an inner channel 12 is produced, from which the groove 10 may be said torecede; and between the outer edge of the fian 'e 7 and the outersurface or periphery of the pipe section a channel 13 is provided fromwhich the groove- 9 recedes. In other words, the anchor or groutinggrooves 9 and 10 open into or have comnninication with the channels 12and 13, and the latter are in communication ward flow of the grooves 9and also flows downwardly throughthe cross-channels 11 into the lowerchannels 12- and grooves 10, the, grouting or plastic concrete beingapplied in such quantity until 15' all of the. channels and 'grooves arefilled and the joint sealed, the grouting or concrete beingigiven afinished surface by the use of suitab e tools atjthe upper portions ofthe joined sections or where the channels 13 are formed and unite. Itwill be observed that there will he no obstruction to the clown-'routing or concrete material in view of the downward inclination of thecross-channels 11. Then the grouting or plastic cement has beenapplied-as just-exp ained it will be anchored or clenched throughthe'medium of the keys formed therein by the rooves 9 and 10, and thegrouting when 'idiardened will be reliably held in place-both in' theinnerand outer channels, and blowing-outot the grouting by inner orouter pressure is prevented.- lhe cross-channels 11 also afford meansfor clos- .-ing the inner united channels 12 by gravitation'of thegrouting or plastic concrete, and

through the construction specified the pipe sections may be laid inwater and. the inner channels 12 grouted or filled with plastic concretefrom the top of the united sections in a perfect manner and a positivebond between the two channels and pipe sections is provided.

WVhat is claimed as new is:

In a sectional conduit, the combination of abutting sections having theopposite ends formed with segmental flanges which are less in thicknessthan the body of the sections and the one flange having its inner edgecoinciding with the inner surface of the section and the remainingflange having its outer edge coinciding with the outer surface of thesection to provide outer and inner channels formed in the upper andlower {portions of the adjacentends of the sections,

anchor grooves being formed at the inner termmals of the flanges andopening into and receding from the said channels, the

anchor grooves having-their lower portions flush with the upper surfacesof the flanges and the outer and inner channels being connected bycross-channels forming the means of communication between the saidchannels and grooves.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

CHARLES C. ALLEN. CHARLES H. BUSC-H.

Witnesses:

Louis J. STU'rT, OLIVER STEVENSON.

